USB to 4-port RS-485/422 Converter

  • Supports bilateral switching of data between 1 USB interface and 4 RS-485/422 serial ports
  • Low CPU utilization during usage, stable performance
  • Autotunning of serial port signal rate, baud rate of serial port 300bps~230400bps
  • Serial port supports 1500W surge protection, 15kV electrostatic protection
  • Supports optional 5VDC power supply input or USB power supply (USB and external 5VDC power supply can supply electricity simultaneously)
  • Supports -20~60℃ wide temperature operation


USB4485 is a USB to RS-485/422 interface converter, which can achieve bilateral switching of data between USB interface and 4 RS-485/422 serial ports. The product supports 1 USB interface and 4 RS-485/422 serial ports. Serial port is equipped with 1500W surge protection and 15kV electrostatic protection, which can effectively protect the device from damage. It adopts desktop mounting to meet the requirements of different application fields.

The product provides matched driver program software; USB interface connected to PC will make up a serial COM port in the computer system. PC host can communicate with RS-485/422 serial device via virtual COM port.

Hardware adopts fanless, low power consumption, wide temperature design and has passed rigorous industrial standard tests, which can suit for the industrial scene environment with harsh requirements for EMC. It can be widely used in PLC, Industrial Automatic Control, IC Card Toll Collection System, and Data Acquisition Control System, etc.

Serial Port  

Standard: EIA RS-485, RS-422

Quantity of serial port: 4 RS-485/422 serial ports

RS-485 signal: D+, D-, GND

RS-422 signal: T+, T-, GND, R+, R-

Baud rate: 300bps~230400bps

Data bit: 7bit, 8bit

Stop bit: 1bit, 2bit

Parity bit: None, Even, Odd, Space, Mark

Flow control: XON/XOFF

Interface form: DB9, Male

Transmission distance: 1200m

Interface protection: 1500W surge protection, 15kV electrostatic protection



USB Port



Standard: USB 1.1, USB 2.0

Quantity of interfaces: 1 USB interface

USB signal: VCC, DATA+, DATA-, GND

Transmission rate: high speed 480Mbps, full speed 12Mbps

Interface form: USB B-type socket, Female

Transmission distance: 5m


Operating System  

Windows 98/ME/2000/XP/Server 2003/Server 2008/7/Vista, Linux, MAC OS-X


LED Indicator  

Power supply indicator, serial port data sending/receiving indicator







Supports optional USB interface power supply or external 5VDC power supply, both can supply electricity simultaneously;Thereinto, 5VDC power supply adopts DC round head, external circle is negative pole, and inner core is positive pole










Operating temperature: -20~60℃

Storage temperature: -40~85℃

Relative humidity: 5%~95% (no condensation)





Housing: metal, IP30 protection grade

Installation: desktop mounting

Dimension (W x H x D): 160mm×28mm×94mm

Weight: 500g






3 years


Available Models USB RS-485/422 Power Supply
USB4485 1 4 5VDC or USB power supply